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The rod, perch, or pole (sometimes also lug) is a surveyor's tool [1] and unit of length of various historical definitions. In British imperial and US customary units, it is defined as 16 + 1 ⁄ 2 feet, equal to exactly 1 ⁄ 320 of a mile, or 5 + 1 ⁄ 2 yards (a quarter of a surveyor's chain), and is exactly 5.0292 meters.
Rood is an English unit of area equal to one quarter of an acre [2] or 10,890 square feet, exactly 1,011.7141056 m 2. A rectangle that is one furlong (i.e., 10 chains, or 40 rods) in length and one rod in width is one rood in area, as is any space comprising 40 perches (a perch being one square rod).
The rod is a historical unit of length equal to 5 + 1 ⁄ 2 yards. It may have originated from the typical length of a mediaeval ox-goad. There are 4 rods in one chain. The furlong (meaning furrow length) was the distance a team of oxen could plough without resting. This was standardised to be exactly 40 rods or 10 chains.
A measuring rod is a tool used to physically measure lengths and survey areas of various sizes. Most measuring rods are round or square sectioned; however, they can also be flat boards. Some have markings at regular intervals. It is likely that the measuring rod was used before the line, chain or steel tapes used in modern measurement. [1]
An acre was 4 rods × 40 rods, i.e. 160 square rods or 36,000 square Anglo-Saxon feet. However, Roman units continued to be used in the construction crafts, and reckoning by the Roman mile of 5,000 feet (or 8 stades ) continued, in contrast to other Germanic countries which adopted the name "mile" for a longer native length closer to the league ...
Rod-shaped bacterium, a shape of bacteria such as E. coli; Rod (optical phenomenon), a photographic artifact claimed by some to be alien life; Rod (unit), an Imperial unit of length, also known as the pole or perch; Rod cell, a cell found in the retina that is sensitive to light/dark (black/white) Real-time outbreak and disease surveillance (RODS)
Egyptian cubit rod in the Liverpool World Museum Cubit rod of Maya, 52.3 cm long, 1336–1327 BC (Eighteenth Dynasty) The cubit is an ancient unit of length based on the distance from the elbow to the tip of the middle finger. [1] It was primarily associated with the Sumerians, Egyptians, and Israelites.
The basic unit of length in the imperial and U.S. customary systems is the yard, defined as exactly 0.9144 m by international treaty ... Determination of the rod ...